. Discuss the three methods of irrigation.
Long Answer
Answers
Answer:1. Wild Flooding.
This method of irrigation consists in turning the water onto natural slopes without much control or prior preparation.
It is usually waste of water, and unless the land is naturally smooth, the resulting irrigation will be quite uneven.
Wild flooding is used mainly for pastures and fields of native hay on steep slopes where abundant water is available and crop values do not warrant more expensive preparations.
Controlled flooding may be accomplished from held ditches or by use of borders, checks, or basins.
Flooding from field ditches is often adaptable to lands with topography too irregular for other flooding methods.
It is relatively inexpensive because it requires minimum of preparation.
2. Furrow Irrigation.
This method of irrigation is widely used for row crops, and small furrows, called corrugations, have been used for forage crops such as alfalfa.
The furrow is a narrow ditch between rows of plants.
An important advantage of the furrow method is that only 0.2 to 0.5 as much surface area is wetted during irrigation as compared with flooding methods of irrigation,
…and evaporation losses are correspondingly reduced.
Furrow irrigation is adapted to lands of irregular topography.
3. Sprinkler Irrigation.
The development of lightweight pipe with quick couplers resulted in a rapid increase in sprinkler irrigation after World War II.
Sprinkler irrigation offers a means of irrigating areas which are so irregular that they prevent use of any surface-irrigation methods.
By using a low supply rate, deep percolation or surface runoff and erosion can be minimized.
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